A brutal murder, lots of suspects and conflicting evidence but the forensics were clear on one thing: The killer knew his victim. And that alone gave investigators a head start.
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A Michigan State University grad student disappeared and was presumed dead. With the help of a professor of geological sciences, police hoped to get the "dirt" on her killer.
When a hit-and-run accident claimed the life of a high school athlete, everyone in town mourned his passing. Finding the killer was a long shot at best.
A lifelong resident of the tiny town of Lefroy, Tasmania was murdered outside his own home. Robbery appeared to be the motive, but with no suspects, the investigation came to a halt.
Police get a clue about a couple who disappeared on Memorial Day weekend during an in-progress robbery.
A brutal murder, lots of suspects and conflicting evidence but the forensics were clear on one thing: The killer knew his victim. And that alone gave investigators a head start.
A college senior was found raped and murdered near an unpaved footpath used by students to walk from one side of campus to the other.
A serial arsonist starts several fires that cause millions of dollars worth of damage and the deaths of three people. He is discovered, partly through the use of forensic hypnosis.
Volunteers and police spend weeks searching for a missing girl. A psychic later leads them to a field where the body was found.
Police were puzzled by an obscure print found at a crime scene where one man had been killed and two teenage girls were seriously injured.
When a man's story of a killing contradicted physical evidence, investigators turned to forensic science.
A bullet-riddled car, a missing driver, and no witnesses, an ambush or a random attack the clue was something so tiny, it was measured in millionths of a meter.
In 1971, John List left a note with the bodies of his family members in his mansion before he disappeared.
A serial arsonist was on the loose in Washington, DC. Each of the fires was started with the same type of incendiary device. The perpetrator was very careful, and seemed to leave no evidence behind... but there were clues in the ashes, and it was up to forensic scientists to find them.
Timothy Wilson Spencer was identified as the man who raped and strangled five young women in Virginia. With the use of DNA profiling, an innocent man is freed and the real killer is convicted.
A beautiful young woman falls to her death from a cliff overlooking the ocean. Initially, investigators think it was a tragic accident. But after a forensic examination, police uncover a very different picture of what happened.
In 2006, Texas real estate agent Sarah Anne Walker was found brutally murdered in a model home.
Eileen and Derrick Severs disappeared from their home in the small village of Hambleton in Great Britain.
In 1991, Grand Junction, Colorado is on edge after a series of deadly bombings kill two people and injure one more. Police race to find the culprit before he strikes again.
Police don't have a basis for comparison to match shoe impressions, blood drops and DNA evidence from a murder scene.
In 1981, six-year-old Cassie Hansen disappeared from her St. Paul, Minnesota church during an evening service.
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